MOBILE, Ala. — Many NFL coaches descended upon the Senior Bowl to watch practices, speak with players, get an up-close and personal look at prospects well in advance of the NFL draft.

The entire staffs of the Jaguars and Cowboys were on hand to coach the two teams. The Ravens were there in full force, the same with the Colts and Lions. The Browns were not all present, but their new head coach, Hue Jackson, was. John Fox and his Bears assistants took it all in, as did Bill O’Brien and his Texans staff.

There was scarcely a Giants coach in the vicinity — special teams coach Tom Quinn was the staff’s lone representative. In keeping with their recent history, they kept the vast majority of their coaches home while the team scouts attended the workouts. New head coach Ben McAdoo stayed back at the team facility, trying to put the finishing touches on his coaching staff. This no-show was nothing new for McAdoo: He never has been to the Senior Bowl, not even when he was an assistant with the Packers.

Some teams believe it benefits the coaching staffs to be here. Others do not see the need.

“You get a chance to see these guys play football,’’ said Cowboys coach Jason Garrett, whose staff coaches the North team. “It’s fun for us to see those guys in this type of atmosphere. It’s one thing to say we go to Ohio State, we see ’em work out for 45 minutes and run routes. That’s one thing. But over the course of three days, we’re gonna see ’em compete against the best players in the country, playing football, with a helmet on, shoulder pads, football pants and cleats. He’s gonna be in practice situations that he’s gonna be in next year on an NFL team, we’ll see him in game situations.

“I think [if] you would ask any coach or personnel guy in the NFL, I think what they want to evaluate more than anything else is their ability to play football, and this is the best opportunity for us to get a chance to see these guys do that.”

Former Giants linebacker Chase Blackburn has come to grips with the fact his playing career is finished, and he was at the Senior Bowl practices trying to find an NFL coaching job. He would like to coach linebackers or become a special teams assistant.

Former defensive coordinator Perry Fewell said that while with the Giants, Blackburn knew the playbook as well or better than he did.

The Giants met with Rutgers wide receiver Leonte Carroo, who came out of Wednesday’s practice with an ankle injury that will take him out of Saturday’s game.

Bears coach John Fox was non-committal to The Post on the future for Antrel Rolle in Chicago after an injury-plagued first season for the former Giants safety.

“Great guy, tough,’’ Fox said of Rolle.

Alabama defensive lineman Jarran Reed, projected to possibly go in the first round of the draft, said he believes his versatility to play anywhere along the line is his greatest asset. It’s a trait the Giants look for among their defensive linemen.

“That’s a great fit,’’ Reed said of the Giants. “They want to take me with their pick I’ll be blessed.”

Of the five Alabama players on the South squad, quarterback Jake Coker might have gone the most under the radar — even though he was just a few weeks removed from leading the Crimson Tide to the national championship with a victory over Clemson.

“Jake did a great job for us all year long,’’ Alabama coach Nick Saban said. “He improved, he never got frustrated. I think he won the team over in the Ole Miss game, the way he competed in the game. Once that happened he started to develop confidence and the team developed confidence in him. … He can certainly make all the throws. I think he has a future.’’

Garrett, on seeing the Tom Coughlin era end with the Giants: “My admiration and respect for him is as high as it can be. He’s just had such a positive impact on the National Football League, coached some of the great players and the great teams during his time. Just have tremendous respect and admiration for him.’’